There is a rapidly growing wealth of data [1]. The number of sources of data is increasing,
while, at the same time, the diversity, complexity and scale of these data resources are also increasing
dramatically. This cornucopia of data oers much potential; a combinatorial explosion of opportunities
for knowledge discovery, improved decisions and better policies. Today, most of these opportunities are
not realised because composing data from multiple sources and extracting information is too dicult.
Every business, organisation and government faces problems that can only be addressed successfully if
we improve our techniques for exploiting the data we gather.